ROS13HRXMM - ROSAT 13-hour Field XMM-Newton X-Ray Source Catalog

This table contains the results of a deep X-ray survey conducted
with XMM-Newton, centered on the UK ROSAT 13-hours deep field area. This
region covers 0.18 square degrees, and is the first of the two areas covered
with XMM-Newton as part of an extensive multi-wavelength survey designed to
study the nature and evolution of the faint X-ray source population.
This table contains the final catalog of 225 sources. Within the central 9
arcminutes, 68% of the source positions are accurate to 2 arcseconds, making
optical follow-up relatively straightforward. The authors construct the N(>S)
relation in four energy bands: 0.2-0.5, 0.5-2, 2-5 and 5-10 keV. In all but
the highest energy band, they find that the source counts can be represented
by a double power law with a bright-end slope consistent with the Euclidean
case and a break around 10^-14 erg cm^-2 s^-1. Below this flux, the counts
exhibit a flattening.

The 13-hours deep field is centered on the sky coordinates RA(J2000) =
13 34 37.1, Dec (J2000) = +37 53 02.2. The XMM-Newton observations were
carried out in three separate revolutions during June 2001 for a total
exposure time of 200ks. Approximately 40% of the total observation time was
affected by high particle background flares, arising from soft protons
hitting the detector. The data were therefore temporally filtered to remove
these high-background periods. Filtering reduced the total useful exposure
time from ~200 ks to ~120 ks.

The best-fitting number of source counts for the X-ray source in
the 5.0 - 10.0 keV band, as output by EMLDETECT. If in any energy band there
are fewer counts at the source position in the image than in the background
map, then the number of source counts (and the source flux) are recorded as
zero for that band. In this case, the corresponding counts error (and flux
error) parameter values represent the 1-sigma upper limit.

Source_Number
A running source number in order of increasing J2000.0 Right
Ascension which uniquely identifies an X-ray source.

Name
The name for the X-ray source using the '[LDP2005] ' prefix (for
Loaring, Dwelly, Page 2005) and the source number, as recommended by the CDS
Dictionary of Nomenclature of Celestial Objects.

RA
The Right Ascension of the X-ray source in the selected equinox. The
RA was given in J2000.0 coordinates to a precision of 0.01 seconds of time
in the original table. The astrometry of the individual observations was
corrected for small offsets between the pointings. A source list was
constructed for each observation as described in Section 2.2 of the reference
paper, and cross-correlated with the optical positions of the 214 sources
found in the Chandra catalogue of McHardy et al. (2003, MNRAS, 342, 802) using
the SAS task eposcor. The appropriate offsets in RA and Dec. were then applied
to each of the individual events to tie the XMM-Newton data to the
optical/Chandra/radio coordinate frame.

Dec
The Declination of the X-ray source in the selected equinox. The
Declination was given in J2000.0 coordinates to a precision of 0.01 arcseconds
in the original table. The astrometry of the individual observations was
corrected for small offsets between the pointings. A source list was
constructed for each observation as described in Section 2.2 of the reference
paper, and cross-correlated with the optical positions of the 214 sources
found in the Chandra catalogue of McHardy et al. (2003, MNRAS, 342, 802) using
the SAS task eposcor. The appropriate offsets in RA and Dec. were then applied
to each of the individual events to tie the XMM-Newton data to the
optical/Chandra/radio coordinate frame.

Error_Radius
The one-sigma positional error of the X-ray source from
EMLDETECT, in arcseconds.

Off_Axis
The XMM-Newton off-axis angle of the X-ray source, in arcminutes.

Usb_Counts
The best-fitting number of source counts for the X-ray source in
the 0.2 - 0.5 keV band, as output by EMLDETECT. If in any energy band there
are fewer counts at the source position in the image than in the background
map, then the number of source counts (and the source flux) are recorded as
zero for that band. In this case, the corresponding counts error (and flux
error) parameter values represent the 1-sigma upper limit.

Usb_Counts_Error
The 1-sigma error to the best-fitting number of source
counts for the X-ray source in the 0.2 - 0.5 keV band, as output by EMLDETECT.
If in any energy band there are fewer counts at the source position in the
image than in the background map, then the number of source counts (and the
source flux) are recorded as zero for that band. In this case, the
corresponding counts error (and flux error) parameter values represent
the 1-sigma upper limit.

SB_Counts
The best-fitting number of source counts for the X-ray source in
the 0.5 - 2.0 keV band, as output by EMLDETECT. If in any energy band there
are fewer counts at the source position in the image than in the background
map, then the number of source counts (and the source flux) are recorded as
zero for that band. In this case, the corresponding counts error (and flux
error) parameter values represent the 1-sigma upper limit.

SB_Counts_Error
The 1-sigma error to the best-fitting number of source
counts for the X-ray source in the 0.5 - 2.0 keV band, as output by EMLDETECT.
If in any energy band there are fewer counts at the source position in the
image than in the background map, then the number of source counts (and the
source flux) are recorded as zero for that band. In this case, the
corresponding counts error (and flux error) parameter values represent
the 1-sigma upper limit.

MB_Counts
The best-fitting number of source counts for the X-ray source in
the 2.0 - 5.0 keV band, as output by EMLDETECT. If in any energy band there
are fewer counts at the source position in the image than in the background
map, then the number of source counts (and the source flux) are recorded as
zero for that band. In this case, the corresponding counts error (and flux
error) parameter values represent the 1-sigma upper limit.

MB_Counts_Error
The 1-sigma error to the best-fitting number of source
counts for the X-ray source in the 2.0 - 5.0 keV band, as output by EMLDETECT.
If in any energy band there are fewer counts at the source position in the
image than in the background map, then the number of source counts (and the
source flux) are recorded as zero for that band. In this case, the
corresponding counts error (and flux error) parameter values represent
the 1-sigma upper limit.

HB_Counts_Error
The 1-sigma error to the best-fitting number of source
counts for the X-ray source in the 5.0 - 10.0 keV band, as output by EMLDETECT.
If in any energy band there are fewer counts at the source position in the
image than in the background map, then the number of source counts (and the
source flux) are recorded as zero for that band. In this case, the
corresponding counts error (and flux error) parameter values represent
the 1-sigma upper limit.

Usb_Flux
The flux of the X-ray source in the 0.2 - 0.5 keV band, in erg
cm^-2 s^-1, obtained from the corresponding counts in this band and an adopted
energy conversion factor for this band of 4.7775 cts per 10^-11 erg cm^-2.
The conversion factors from count rates to flux were determined from the EPIC
response matrices, over exactly the same energy ranges as those in which the
images were constructed, assuming a power-law spectrum with photon index Gamma
of 1.7 (a good average within this flux range). If in any energy band there
are fewer counts at the source position in the image than in the background
map, then the number of source counts (and the source flux) are recorded as
zero for that band. In this case, the corresponding counts error (and flux
error) parameter values represent the 1-sigma upper limit.

Usb_Flux_Error
The 1-sigma error to the flux of the X-ray source in the
0.2 - 0.5 keV band, in erg cm^-2 s^-1. If in any energy band there are fewer
counts at the source position in the image than in the background map,
then the number of source counts (and the source flux) are recorded as
zero for that band. In this case, the corresponding counts error (and flux
error) parameter values represent the 1-sigma upper limit.

SB_Flux
The flux of the X-ray source in the 0.5 - 2.0 keV band, in erg
cm^-2 s^-1, obtained from the corresponding counts in this band and an adopted
energy conversion factor for this band of 4.8905 cts per 10^-11 erg cm^-2.
The conversion factors from count rates to flux were determined from the EPIC
response matrices, over exactly the same energy ranges as those in which the
images were constructed, assuming a power-law spectrum with photon index Gamma
of 1.7 (a good average within this flux range). If in any energy band there
are fewer counts at the source position in the image than in the background
map, then the number of source counts (and the source flux) are recorded as
zero for that band. In this case, the corresponding counts error (and flux
error) parameter values represent the 1-sigma upper limit.

SB_Flux_Error
The 1-sigma error to the flux of the X-ray source in the
0.5 - 2.0 keV band, in erg cm^-2 s^-1. If in any energy band there are fewer
counts at the source position in the image than in the background map,
then the number of source counts (and the source flux) are recorded as
zero for that band. In this case, the corresponding counts error (and flux
error) parameter values represent the 1-sigma upper limit.

MB_Flux
The flux of the X-ray source in the 2.0 - 5.0 keV band, in erg
cm^-2 s^-1, obtained from the corresponding counts in this band and an adopted
energy conversion factor for this band of 1.9605 cts per 10^-11 erg cm^-2.
The conversion factors from count rates to flux were determined from the EPIC
response matrices, over exactly the same energy ranges as those in which the
images were constructed, assuming a power-law spectrum with photon index Gamma
of 1.7 (a good average within this flux range). If in any energy band there
are fewer counts at the source position in the image than in the background
map, then the number of source counts (and the source flux) are recorded as
zero for that band. In this case, the corresponding counts error (and flux
error) parameter values represent the 1-sigma upper limit.

MB_Flux_Error
The 1-sigma error to the flux of the X-ray source in the
2.0 - 5.0 keV band, in erg cm^-2 s^-1. If in any energy band there are fewer
counts at the source position in the image than in the background map,
then the number of source counts (and the source flux) are recorded as
zero for that band. In this case, the corresponding counts error (and flux
error) parameter values represent the 1-sigma upper limit.

HB_Flux
The flux of the X-ray source in the 5.0 - 10.0 keV band, in erg
cm^-2 s^-1, obtained from the corresponding counts in this band and an adopted
energy conversion factor for this band of 0.5929 cts per 10^-11 erg cm^-2.
The conversion factors from count rates to flux were determined from the EPIC
response matrices, over exactly the same energy ranges as those in which the
images were constructed, assuming a power-law spectrum with photon index Gamma
of 1.7 (a good average within this flux range). If in any energy band there
are fewer counts at the source position in the image than in the background
map, then the number of source counts (and the source flux) are recorded as
zero for that band. In this case, the corresponding counts error (and flux
error) parameter values represent the 1-sigma upper limit.

HB_Flux_Error
The 1-sigma error to the flux of the X-ray source in the
5.0 - 10.0 keV band, in erg cm^-2 s^-1. If in any energy band there are fewer
counts at the source position in the image than in the background map,
then the number of source counts (and the source flux) are recorded as
zero for that band. In this case, the corresponding counts error (and flux
error) parameter values represent the 1-sigma upper limit.

Flux
The flux of the X-ray source in the full 0.2 - 10.0 keV band, in erg
cm^-2 s^-1, obtained from the sum of the individual band fluxes.

Flux_Error
The 1-sigma error to the flux of the X-ray source in the
0.2 - 10.0 keV band, in erg cm^-2 s^-1

Chandra_Source_Number
The catalog number of the Chandra source counterpart
to the XMM-Newton source, taken from McHardy et al. (2003, MNRAS, 342, 802).

Alt_Name
The name of the Chandra source counterpart (McHardy et al. 2003,
MNRAS, 342, 802) to the XMM-Newton source, using the '[MGN2003] ' prefix (for
McHardy, Gunn, Newsam 2003) and the Chandra source number, as recommended by
the CDS Dictionary of Nomenclature of Celestial Objects.

Offset
The offset in position between the XMM-Newton source and its
Chandra counterpart, in arcseconds.